Malicious PDF — malware analysis report

Static analysis result for SHA-256 8998a0396883d98d…

MALICIOUS

PDF

79.4 KB Created: 2021-04-01 03:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2230e3c028d5a9ae6c5c510ca7fc87de SHA-1: 7be882f476b1a8ed04f912dc4d462a1c8911ec45 SHA-256: 8998a0396883d98d2df536cd78aa08acc24cb9ea1d9feeacbfaa2185d4429c97
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically indicating a phishing or scam attempt. The presence of numerous external links, including a link farm, suggests an attempt to redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in tech support scams or refund fraud schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://vilenefex.ru/strik?utm_term=elkay+water+fountain+customer+service+phone+number PDF link annotation
    • http://blancer.xyz/84195692726kgp9e.pdfIn PDF document text
    • https://levufiturosotin.weebly.com/uploads/1/3/4/4/134466711/651a5b.pdfIn PDF document text
    • https://nefolebar.weebly.com/uploads/1/3/4/4/134400051/kezit-mirebi-vugat-dufepososeparo.pdfIn PDF document text
    • https://tovijivesigaz.weebly.com/uploads/1/3/5/3/135327805/9575997.pdfIn PDF document text
    • https://mabamakozipapap.weebly.com/uploads/1/3/4/3/134315796/2233447.pdfIn PDF document text
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/nefikosu.pdfIn PDF document text
    • https://bazunebusa.weebly.com/uploads/1/3/5/3/135397504/3b43a595db.pdfIn PDF document text
    • http://phtech.site/tepajexujuwotix88okm.pdfIn PDF document text
    • http://fineagencyy.com/queen_flannel_sheets_bed_bath_and_beyondztrqg.pdfIn PDF document text
    • https://nebomigefut.weebly.com/uploads/1/3/4/3/134359696/rorametelo.pdfIn PDF document text
    • http://ighelpcenter.xyz/80375017170dy581.pdfIn PDF document text
    • http://bioforcecolumbia.site/ali_demirsoy_kitaplars5n6i.pdfIn PDF document text
    • http://mebel-albero.ru/gurodajuvinadv1398.pdfIn PDF document text
    • http://winoorama.site/bamepateledumigc0nk.pdfIn PDF document text
    • https://fudixiboronis.weebly.com/uploads/1/3/4/3/134322082/tusibuxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/79787500338.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/elapsed_time_3rd_grade_free_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/argumentation_musterlsung.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/19820114034.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/legends_never_die_viola_sheet_music.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7B 5672 bytes
SHA-256: 513335638ca3e5450f34b1bc35f38fc926e38466b491f7d98de741035a0b031b
font_01_sfnt_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 15200 bytes
SHA-256: 543f23a00aa4728fbe0b75adfb69d858437b07c619e71762193331df92f170c8

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